A dust suppression device for construction sites

Abstract

This utility model belongs to the field of construction site dust suppression technology, specifically a construction site dust suppression device, including a base plate. A lifting plate is provided in the middle of the top side of the base plate. Mounting plates are fixedly connected to the front and rear sides of the top of the lifting plate. An atomizing cylinder is rotatably installed between the two sets of mounting plates. This utility model actively collects dust particles that do not settle during the spraying process of the atomizing cylinder through the dust collection port, and combines it with the spray treatment in the spray tank to effectively prevent secondary dust. At the same time, the return component filters the wastewater and circulates it to the water tank to realize closed-loop management of water resources. In addition, the modular design of the filter plate, connecting pipe and sealing cover structure supports quick disassembly and replacement, which is convenient for cleaning blockages or replacing filter elements.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression technology at construction sites, specifically a dust suppression device for construction sites. Background Technology

[0002] With the acceleration of urbanization, construction sites have become an important part of urban development. However, the dust pollution generated during construction is becoming increasingly serious, affecting not only air quality but also posing a threat to human health. Dust pollution increases the concentration of particulate matter such as PM2.5 and PM10 in the air, increasing the risk of respiratory diseases. At the same time, this dust will drift into the air and pollute the urban environment. Dust reduction measures can significantly reduce the degree of dust pollution. Traditional dust reduction methods mainly include water spraying, enclosure, and hardening treatment.

[0003] Chinese patent (authorization announcement number: CN222518133U, authorization announcement date: 2025.02.25) proposes a dust suppression device for construction sites. The dust suppression device for construction sites described in this utility model can be adjusted according to the environment of the construction site by setting a height adjustment component, so that it can more accurately target the source of dust generation and improve dust suppression efficiency. The setting of spraying mechanism, fan and other components can quickly blow the fine mist droplets generated by the spraying part to a wider area, which helps the mist droplets to cover the entire dust suppression area more evenly and improve the dust suppression effect.

[0004] The dust suppression devices used at the construction sites mentioned above typically rely solely on spray systems to achieve dust settling. This involves using a high-pressure water pump to atomize water and spray it into the air, utilizing the adsorption effect between water mist particles and dust particles to promote dust settling. However, relying solely on spraying for dust suppression means that some dust is not effectively settled, and these unsettled dust particles remain suspended in the air, potentially leading to secondary dust generation. Therefore, we propose a dust suppression device for construction sites. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a dust suppression device for construction sites. It actively collects dust particles that do not settle during the spraying process of the atomizing cylinder through the dust collection port, and combines this with spraying treatment inside the spray tank to effectively prevent secondary dust generation. At the same time, the return component filters wastewater and circulates it back to the water tank, realizing closed-loop management of water resources and solving the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dust suppression device for construction sites, comprising a base plate, a lifting plate disposed at the center of the top side of the base plate, mounting plates fixedly connected to the front and rear sides of the top of the lifting plate, an atomizing cylinder rotatably mounted between the two sets of mounting plates, an electric push rod two hinged to the bottom right side of the atomizing cylinder, and the bottom of the electric push rod two hinged to the top right side of the lifting plate, a water tank mounted on the top left side of the base plate, a water inlet opened on the top rear side of the water tank, a dust collection port mounted on the top right side of the base plate, a spray tank mounted on the top front side of the base plate, a lifting assembly for lifting the atomizing cylinder mounted on the top of the base plate, an air inlet assembly mounted on the spray tank, a spray assembly mounted on the top rear side of the base plate, and a return assembly mounted between the spray tank and the water tank.

[0007] Preferably, the lifting assembly includes an electric push rod, which is fixedly installed on the top of the base plate. The output shaft end of the electric push rod is fixedly connected to the bottom side of the lifting plate. Telescopic rods are installed at the four corners of the bottom of the lifting plate, and the bottom ends of the telescopic rods are fixedly connected to the top side of the base plate.

[0008] Preferably, the air inlet assembly includes a top cover threaded onto the top of the spray tank. The top of the top cover has an air outlet and an air inlet on its left and right sides, respectively. The top input end of the air inlet is fixedly connected to the left output end of the dust collection port via a pipe. The bottom output end of the air inlet is fixedly connected to an air inlet pipe, and the output end of the air inlet pipe is fixedly connected to an air inlet hopper. The air outlet has a slot into which a filter plate is inserted. The bottom of the spray tank has a mud outlet pipe, and the bottom output end of the mud outlet pipe is threadedly fitted with a sealing cap. A blower is installed on the top side of the water tank. The input end of the blower is fixedly connected to the top output end of the air outlet via a pipe, and the output end of the blower is fixedly connected to the left input end of the atomizing cylinder via a pipe.

[0009] Preferably, the spray assembly includes a high-pressure water pump, which is fixedly installed on the top rear side of the base plate. The input end of the high-pressure water pump is fixedly connected to the water tank through a pipe, and the output end of the high-pressure water pump is fixedly connected to a water inlet pipe. An annular pipe is fixedly connected to the inner wall of the right side of the atomizing cylinder, and a plurality of atomizing nozzles are fixedly connected to the right side of the annular pipe. The output end of the water inlet pipe is fixedly connected to the annular pipe. A water inlet is provided on the top rear side of the spray tank. The output end of the water inlet is fixedly connected to a second atomizing nozzle, and the input end of the water inlet is fixedly connected to a second water inlet pipe. The input end of the second water inlet pipe is fixedly connected to the first water inlet pipe.

[0010] Preferably, the reflux assembly includes a reflux pump, which is located at the front of the water tank. The output end of the reflux pump is fixedly connected to the water tank via a pipe, and the input end of the reflux pump is fixedly connected to a reflux pipe. A branch pipe is opened on the left side of the sludge outlet pipe, and a connecting pipe is provided between the reflux pipe and the branch pipe. Several filter plates are fixedly connected inside the connecting pipe. Threaded grooves are opened on the outer surface of the end of the reflux pipe and the branch pipe near the connecting pipe. Threaded sleeves are threaded onto both sets of threaded grooves. Limiting grooves are opened on the left and right outer surfaces of the connecting pipe. Limiting strips are fixedly connected to the inner walls of the two sets of threaded sleeves on the side closest to each other. The two sets of limiting strips are movably sleeved on the two sets of limiting grooves respectively.

[0011] Preferably, a handrail is fixedly installed on the top left side of the base plate, and casters are installed at the four bottom corners of the base plate.

[0012] This utility model provides a dust suppression device for construction sites. Compared with the prior art, it has the following advantages:

[0013] 1. This construction site dust suppression device actively collects dust particles that do not settle during the spraying process of the atomizing cylinder through the dust collection port, and combines it with the spray treatment in the spray tank to effectively prevent secondary dust. At the same time, the return component filters the wastewater and circulates it to the water tank to realize closed-loop management of water resources. In addition, the modular design of the filter plate, connecting pipe and sealing cover structure supports quick disassembly and replacement, which is convenient for cleaning blockages or replacing filter elements. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0015] Figure 2 This is a schematic diagram of the rear view of the main body structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the external structure of the spray tank of this utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the spray tank of this utility model;

[0018] Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Base plate; 2. Lifting plate; 3. Atomizing cylinder; 4. Limiting strip; 5. Handrail; 6. Spray tank; 7. Casters; 8. Dust collection port; 9. Electric push rod one; 10. Telescopic rod; 11. Blower; 12. Mounting plate; 13. Circular pipe; 14. Atomizing nozzle one; 15. Return pump; 16. Return pipe; 17. Electric push rod two; 18. Water inlet pipe one; 19. Water inlet pipe two; 20. Height 21. Water pump; 22. Water inlet; 23. Top cover; 24. Air outlet; 25. Air inlet; 26. Slot; 27. Filter plate one; 28. Sludge outlet pipe; 29. ​​Sealing cover; 30. Branch pipe; 31. Water inlet; 32. Atomizing nozzle two; 33. Air inlet pipe; 34. Air inlet hopper; 35. Connecting pipe; 36. Filter plate two; 37. Threaded sleeve; 38. Limiting groove; 39. Threaded groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a dust suppression device for construction sites, including a base plate 1, a lifting plate 2 disposed at the top center of the base plate 1, mounting plates 12 fixedly connected to the front and rear sides of the top of the lifting plate 2, an atomizing cylinder 3 rotatably mounted between the two sets of mounting plates 12, an electric push rod 17 hinged to the bottom right side of the atomizing cylinder 3, and the bottom of the electric push rod 17 hinged to the top right side of the lifting plate 2, a water tank 21 installed on the top left side of the base plate 1, a water inlet 22 opened on the top rear side of the water tank 21, a dust collection port 8 installed on the top right side of the base plate 1, a spray tank 6 installed on the top front side of the base plate 1, a lifting assembly for lifting the atomizing cylinder 3 installed on the top of the base plate 1, an air inlet assembly installed on the spray tank 6, a spray assembly installed on the top rear side of the base plate 1, and a return assembly installed between the spray tank 6 and the water tank 21.

[0022] The dust suppression device at the construction site uses a base plate 1 as its basic support structure. The lifting plate 2 at the top center of the base plate 2 is height-adjustable via a lifting assembly. Two sets of mounting plates 12 at the top of the lifting plate 2 are used to rotate and install the atomizing cylinder 3. The bottom right side of the atomizing cylinder 3 is hinged to the top right side of the lifting plate 2 via an electric push rod 17. The tilt angle of the atomizing cylinder 3 is adjusted by extending and retracting the electric push rod 17, thereby adjusting the spray direction. The water tank 21 is located on the top left side of the base plate 1 and is replenished with water through the water inlet 22. The dust collection port 8 is located on the top right side of the base plate 1 and is used to collect dust particles that have not settled during the spraying process. The spraying tank 6 is installed on the top front side of the base plate 1 and introduces external air through the air inlet assembly to enhance the atomization effect. The spraying assembly is located on the top rear side of the base plate 1 and drives the water in the water tank 21 to be transported to the atomizing cylinder 3 and the spraying tank 6 to form a multi-stage spray coverage. The spraying tank 6 and the water tank 21 are connected by a return assembly. The return assembly filters the wastewater after spraying and then transports it back to the water tank 21 to achieve water resource recycling.

[0023] The lifting assembly includes an electric push rod 9, which is fixedly installed on the top of the base plate 1. The output shaft end of the electric push rod 9 is fixedly connected to the bottom side of the lifting plate 2. Telescopic rods 10 are installed at the four corners of the bottom of the lifting plate 2, and the bottom ends of the telescopic rods 10 are fixedly connected to the top side of the base plate 1.

[0024] The lifting assembly is fixedly installed on the top of the base plate 1 via an electric push rod 9. Its output shaft end is fixedly connected to the bottom side of the lifting plate 2 to realize the vertical lifting control of the lifting plate 2. The bottom ends of the telescopic rods 10 at the four corners of the bottom of the lifting plate 2 are fixedly connected to the top side of the base plate 1. The telescopic action of the telescopic rods 10 further stabilizes the lifting process of the lifting plate 2 and ensures the stability of the device when adjusting the height.

[0025] The air inlet assembly includes a top cover 23, which is threaded onto the top of the spray tank 6. The top left and right sides of the top of the top cover 23 are respectively provided with an air outlet 24 and an air inlet 25. The top input end of the air inlet 25 is fixedly connected to the left output end of the dust collection port 8 through a pipe. The bottom output end of the air inlet 25 is fixedly connected to an air inlet pipe 33. The output end of the air inlet pipe 33 is fixedly connected to an air inlet hopper 34. The air outlet 24 is provided with a slot 26, and a filter plate 27 is inserted into the slot 26. The bottom of the spray tank 6 is provided with a mud outlet pipe 28. The bottom output end of the mud outlet pipe 28 is threadedly connected to a sealing cap 29. A blower 11 is provided on the top side of the water tank 21. The input end of the blower 11 is fixedly connected to the top output end of the air outlet 24 through a pipe. The output end of the blower 11 is fixedly connected to the left input end of the atomizing cylinder 3 through a pipe.

[0026] The air inlet assembly is threaded onto the top of the spray tank 6 via the top cover 23. The top of the top cover 23 has an air outlet 24 and an air inlet 25 on the left and right sides respectively. The top input end of the air inlet 25 is fixedly connected to the left output end of the dust collection port 8 through a pipe to introduce external air. The bottom output end of the air inlet 25 is fixedly connected to an air inlet pipe 33. The output end of the air inlet pipe 33 is further connected to the air inlet hopper 34 to evenly guide the air into the spray tank 6. A filter plate 27 is inserted into the air outlet 24 to filter impurities in the air entering the blower 11. The input end of the blower 11 is fixedly connected to the top output end of the air outlet 24 through a pipe, and the output end is fixedly connected to the left input end of the atomizing cylinder 3 through a pipe to form an airflow circulation system, which enhances the atomization effect and promotes dust settling.

[0027] The spray assembly includes a high-pressure water pump 20, which is fixedly installed on the top rear side of the base plate 1. The input end of the high-pressure water pump 20 is fixedly connected to the water tank 21 through a pipe. The output end of the high-pressure water pump 20 is fixedly connected to the inlet pipe 18. The inner wall of the right side of the atomizing cylinder 3 is fixedly connected to an annular pipe 13. Several atomizing nozzles 14 are fixedly connected to the right side of the annular pipe 13. The output end of the inlet pipe 18 is fixedly connected to the annular pipe 13. The top rear side of the spray tank 6 has an inlet 31. The output end of the inlet 31 is fixedly connected to the atomizing nozzle 32. The input end of the inlet 31 is fixedly connected to the inlet pipe 19. The input end of the inlet pipe 19 is fixedly connected to the inlet pipe 18.

[0028] The spray assembly is fixedly installed on the top rear side of the base plate 1 via a high-pressure water pump 20. Its input end is fixedly connected to the water tank 21 via a pipe, and its output end is fixedly connected to a water inlet pipe 18. The output end of the water inlet pipe 18 is fixedly connected to the annular pipe 13 on the right inner wall of the atomizing cylinder 3. Several atomizing nozzles 14 are fixedly connected to the right side of the annular pipe 13 to achieve water atomization spraying. The water inlet 31 at the top rear side of the spray tank 6 is fixedly connected to the water inlet pipe 18 via a second water inlet pipe 19. The output end of the water inlet 31 is connected to the second atomizing nozzle 32 to spray the dust and air inside the spray tank 6.

[0029] The reflux assembly includes a reflux pump 15, which is located in front of the water tank 21. The output end of the reflux pump 15 is fixedly connected to the water tank 21 through a pipe. The input end of the reflux pump 15 is fixedly connected to a reflux pipe 16. A branch pipe 30 is opened on the left side of the mud outlet pipe 28. A connecting pipe 35 is provided between the reflux pipe 16 and the branch pipe 30. Several filter plates 36 are fixedly connected inside the connecting pipe 35. Threaded grooves 39 are opened on the outer surface of the reflux pipe 16 and the branch pipe 30 near the connecting pipe 35. Threaded sleeves 37 are threadedly fitted on both sets of threaded grooves 39. Limiting grooves 38 are opened on the left and right outer surfaces of the connecting pipe 35. Limiting strips 4 are fixedly connected to the inner wall of the side of the two sets of threaded sleeves 37 that are close to each other. The two sets of limiting strips 4 are movably fitted on the two sets of limiting grooves 38 respectively.

[0030] The reflux assembly is installed in front of the water tank 21 via the reflux pump 15. Its input end is connected to the branch pipe 30 on the left side of the sludge outlet pipe 28 at the bottom of the spray tank 6 via the reflux pipe 16. The branch pipe 30 and the reflux pipe 16 are fixedly connected by the connecting pipe 35. The connecting pipe 35 is equipped with a filter plate 36 to filter impurities in the reflux wastewater. The outer surface of the reflux pipe 16 and the branch pipe 30 near the connecting pipe 35 is provided with threaded grooves 39, and they are movably connected to the limiting strip 4 on the limiting groove 38 through the threaded sleeve 37 to achieve modular disassembly and sealing. The reflux pump 15 transports the filtered wastewater back to the water tank 21 to form a water resource recycling system.

[0031] A handrail 5 is fixedly installed on the top left side of the base plate 1 to facilitate the operator to push or fix the device. Casters 7 are installed at the four corners of the bottom of the base plate 1 to provide flexible mobility and facilitate the quick transfer of equipment on the construction site.

[0032] Working principle: The dust suppression device at the construction site uses the base plate 1 as the basic support structure. The lifting plate 2 in the middle of the top side is pushed by the output shaft end of the electric push rod 9 to realize the vertical lifting control of the lifting plate 2. The telescopic rods 10 at the four corners of the bottom of the lifting plate 2 further stabilize the lifting process of the lifting plate 2, ensuring the stability of the device when adjusting the height. The two sets of mounting plates 12 on the top of the lifting plate 2 are used to rotate and install the atomizing cylinder 3. The bottom right side of the atomizing cylinder 3 is hinged to the top right side of the lifting plate 2 by the electric push rod 17. The tilt angle of the atomizing cylinder 3 is adjusted by the extension and retraction of the electric push rod 17, thereby adjusting the spray direction. The water tank 21 is located on the top left side of the base plate 1 and water is added through the water inlet 22. The dust collection port 8 is set on the top right side of the base plate 1 to collect dust particles that have not settled during the spraying process.

[0033] The spray tank 6 is installed on the top front side of the base plate 1. The top cover 23 is threaded onto the top of the spray tank 6. The top of the top cover 23 has an air outlet 24 and an air inlet 25 on the left and right sides, respectively. The top input end of the air inlet 25 is fixedly connected to the left output end of the dust collection port 8 through a pipe to introduce external air. The bottom output end of the air inlet 25 is fixedly connected to an air inlet pipe 33. The output end of the air inlet pipe 33 is further connected to the air inlet hopper 34 to evenly guide the air into the spray tank 6. Since the input end of the high-pressure water pump 20 is fixedly connected to the water tank 21 through a pipe, and the output end is fixedly connected to the first water inlet pipe 18, the water inlet 31 on the rear top of the spray tank 6 is fixedly connected to the first water inlet pipe 18 through the second water inlet pipe 19. The output end of 31 is connected to the second atomizing nozzle 32, so the dusty air in the spray tank 6 is sprayed through the second atomizing nozzle 32. A filter plate 27 is inserted into the air outlet 24 to filter the air impurities entering the blower 11. The input end of the blower 11 is fixedly connected to the top output end of the air outlet 24 through a pipe, and the output end is fixedly connected to the left input end of the atomizing cylinder 3 through a pipe, forming an airflow spray. Since the output end of the water inlet pipe 18 is fixedly connected to the annular pipe 13 on the right inner wall of the atomizing cylinder 3, and several atomizing nozzles 14 are fixedly connected to the right side of the annular pipe 13, a large amount of water mist is sprayed through the several atomizing nozzles 14, which, combined with the airflow of the atomizing cylinder 3, increases the water mist spray range and enhances the atomization effect.

[0034] The return pump 15 is located in front of the water tank 21. Its input end is connected to the branch pipe 30 on the left side of the sludge discharge pipe 28 at the bottom of the spray tank 6 through the return pipe 16. The branch pipe 30 and the return pipe 16 are fixedly connected by the connecting pipe 35. The connecting pipe 35 is equipped with several filter plates 36 to filter impurities in the return wastewater. The outer surface of the return pipe 16 and the branch pipe 30 near the connecting pipe 35 is provided with threaded grooves 39, and the threaded sleeve 37 is movably connected to the limiting strip 4 on the limiting groove 38 to realize modular disassembly and sealing, which is convenient for replacement and maintenance. The return pump 15 transports the filtered wastewater back to the water tank 21 to form a water resource recycling system. After the dust suppression work at the construction site is completed, the sludge is discharged by removing the sealing cover 29 at the bottom of the return pipe 16.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction site dust fall device comprising a base plate (1) characterised in that: A lifting plate (2) is provided at the top center of the base plate (1). Mounting plates (12) are fixedly connected to the front and rear sides of the top of the lifting plate (2). An atomizing cylinder (3) is rotatably installed between the two sets of mounting plates (12). An electric push rod (17) is hinged to the bottom right side of the atomizing cylinder (3), and the bottom of the electric push rod (17) is hinged to the top right side of the lifting plate (2). A water tank (21) is installed on the top left side of the base plate (1). A water inlet (22) is opened on the top rear side of the water tank (21). A dust collection port (8) is installed on the top right side of the base plate (1). A spray tank (6) is installed on the top front side of the base plate (1). A lifting assembly for lifting the atomizing cylinder (3) is installed on the top of the base plate (1). An air inlet assembly is installed on the spray tank (6). A spray assembly is installed on the top rear side of the base plate (1). A return assembly is installed between the spray tank (6) and the water tank (21).

2. The dust suppression device for construction sites according to claim 1, characterized in that: The lifting assembly includes an electric push rod (9), which is fixedly installed on the top of the base plate (1). The output shaft end of the electric push rod (9) is fixedly connected to the bottom side of the lifting plate (2). Telescopic rods (10) are installed at the four corners of the bottom of the lifting plate (2), and the bottom end of the telescopic rods (10) is fixedly connected to the top side of the base plate (1).

3. A dust suppression device for construction sites according to claim 1, characterized in that: The air inlet assembly includes a top cover (23), which is threaded onto the top of the spray tank (6). The top of the top cover (23) has an air outlet (24) on its left and right sides, and an air inlet (25) on its right. The top input end of the air inlet (25) is fixedly connected to the left output end of the dust collection port (8) via a pipe. The bottom output end of the air inlet (25) is fixedly connected to an air inlet pipe (33). The output end of the air inlet pipe (33) is fixedly connected to an air inlet hopper (34). The air outlet (24) has... A slot (26) is provided, and a filter plate (27) is inserted into the slot (26). A mud outlet pipe (28) is provided at the bottom of the spray tank (6). A sealing cap (29) is threaded onto the bottom output end of the mud outlet pipe (28). A blower (11) is provided on the top side of the water tank (21). The input end of the blower (11) is fixedly connected to the top output end of the air outlet (24) through a pipe. The output end of the blower (11) is fixedly connected to the left input end of the atomizing cylinder (3) through a pipe.

4. A dust suppression device for construction sites according to claim 3, characterized in that: The spray assembly includes a high-pressure water pump (20), which is fixedly installed on the top rear side of the base plate (1). The input end of the high-pressure water pump (20) is fixedly connected to the water tank (21) through a pipe. The output end of the high-pressure water pump (20) is fixedly connected to the first water inlet pipe (18). The inner wall of the right side of the atomizing cylinder (3) is fixedly connected to an annular pipe (13). The right side of the annular pipe (13) is fixedly connected to several atomizing nozzles (14). The output end of the first water inlet pipe (18) is fixedly connected to the annular pipe (13). The top rear side of the spray tank (6) is provided with a water inlet (31). The output end of the water inlet (31) is fixedly connected to the second atomizing nozzle (32). The input end of the water inlet (31) is fixedly connected to the second water inlet pipe (19). The input end of the second water inlet pipe (19) is fixedly connected to the first water inlet pipe (18).

5. A dust suppression device for construction sites according to claim 3, characterized in that: The reflux assembly includes a reflux pump (15), which is located on the front side of the water tank (21). The output end of the reflux pump (15) is fixedly connected to the water tank (21) via a pipe. The input end of the reflux pump (15) is fixedly connected to a reflux pipe (16). A branch pipe (30) is provided on the left side of the mud outlet pipe (28). A connecting pipe (35) is provided between the reflux pipe (16) and the branch pipe (30). Several filter plates are fixedly connected inside the connecting pipe (35). Second (36), the outer surface of the return pipe (16) and the branch pipe (30) near the connecting pipe (35) is provided with threaded grooves (39), and threaded sleeves (37) are threadedly sleeved on both sets of threaded grooves (39). Limiting grooves (38) are provided on the left and right outer surfaces of the connecting pipe (35). Limiting strips (4) are fixedly connected to the inner walls of the two sets of threaded sleeves (37) that are close to each other. The two sets of limiting strips (4) are respectively movably sleeved on the two sets of limiting grooves (38).

6. A dust suppression device for construction sites according to claim 1, characterized in that: A handrail (5) is fixedly installed on the top left side of the base plate (1), and casters (7) are installed at the four bottom corners of the base plate (1).

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